psd2 074 ☈ Name:

  1. A student measures a rectangular bar of soap with a length of 6 cm, a width of 3.8 cm, and a height of 1.5 cm. The soap has a mass of 48 grams.
    1. __________ _____ What is the volume of the soap?
    2. __________ _____ What is the density of the soap?
    3. _______________ Will the soap float or sink?
    4. _______________ Is the soap SafeGuard or Ivory?
  2. __________ _____ Calculate the velocity ѵ of a ball that rolls 25 meters in 12.5 seconds.
  3. __________ _____ Calculate the distance a ball with a velocity ѵ of 8 m/s will roll in 9 seconds.
  4. __________ _____ Calculate the time for a ball with a velocity ѵ of 8 m/s to roll 32 meters.
  5. Explain the theory of plate tectonics
  6. __________ _________ Calculate the acceleration of a RipStik that accelerates from 0 m/s to 2 m/s in 6 seconds.
  7. ___________ __________ A 30 kg young girl accelerates from 0 m/s to 2 m/s in 6 seconds. How much force was generated in that acceleration?
  8. __________ _________ A ball is dropped a distance d of 100 cm. A timer records a time t of 0.45 seconds. Use this data to calculate the acceleration gravity g.
  9. Use the data in table one to answer the following questions on pulleys.
    Table one
    force (gmf)load (gmf)
    2050
    80200
    140350
    180450
    1. ____________ What is the actual mechanical advantage for the pulley system?
    2. ____________ The pulley system had three load lines. What is the ideal mechanical advantage?
    3. ____________ Use the preceding two questions to calculate the efficiency of the pulley system.
  10. What is Newton's first law?
  11. In 1982-1983 there were global weather catastrophes. High surf in California, six typhoons in Tahiti, drought in Africa and Australia. Record snowfall in Utah leads to flooding in the normally dry deserts. What was the cause of these catastrophes?
  12. The Pacific ocean floor in the FSM may contain nodules. What are nodules and why are they important?
  13. Fill the following temperatures in Celsius:
    1. _________°C The temperature of a mix of melting ice and water.
    2. _________°C The temperature of melting solid coconut oil.
    3. _________°C The typical daily room temperature in Pohnpei.
    4. _________°C The temperature of the healthy living human body.
    5. _________°C The temperature of a boiling water.
  14. ______________ When walking straight West, which number would change on the GPS unit, the N 06° 54.540' or the E 158° 09.650' number?
  15. _________ _____ The classroom is at E 158° 09.651'. Binky was at E 158° 09.519'. Use a value of 1874 meters per minute to calculate the distance from the classroom to Binky.
  16. ____________________ Plot the data in table two on the graph. Calculate the slope of the line.
    Graphical analysis

    Data

    Table two
    Distance (min)Distance (m)
    0.0000
    0.01530
    0.03060
    0.04590
    background rectangle major grid lines axes text layers minutes versus meters Distance (min) Distance (min) x-axis labels 0 0.010 0.020 0.030 0.040 0.050 y-axis labels 0 10 20 30 40 50 60 70 80 90 100

slope m= (y2−y1) (x2−x1)
percent error= (experimental value−expected value) (expected value)
Volume V = length l × width w × height h
mass m = density ρ × Volume V
ρ= m V
distance d = velocity ѵ × time t
ѵ= Δd Δt
ѵ = at
a= Δѵ Δt

d = ½at²
d = ½gt²
t= ( 2d g )
g= 2d t2
Gravitational Potential Energy = mgh
Kinetic Energy = ½mѵ²
momentum = mѵ
Force F = mass m × acceleration a
efficiency= actual mechanical advantage ideal mechanical advantage

where:
a is acceleration
d is distance
Δ is "the change in" (greek lowercase delta)

g is the acceleration of gravity where g is:
g = 980 cm/s² (cgs)
g = 9.8 m/s² (mks)

m is mass
p is momentum
t is time
ѵ is velocity